CN103464762B - A kind of P/M piston rings material and preparation method thereof - Google Patents
A kind of P/M piston rings material and preparation method thereof Download PDFInfo
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- CN103464762B CN103464762B CN201310317435.4A CN201310317435A CN103464762B CN 103464762 B CN103464762 B CN 103464762B CN 201310317435 A CN201310317435 A CN 201310317435A CN 103464762 B CN103464762 B CN 103464762B
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Abstract
The invention discloses a kind of P/M piston rings material and preparation method thereof, be made up of the raw material of following weight percents: Mo7-7.3, W2-2.3, Ti1.2-1.3, Ta0.2-0.3, Hf0.1-0.15, Bi2.0-2.3, carbon black 2-2.3, alundum (Al2O3) 1.0-1.2, auxiliary agent 0.9-1.2, stearic acid 2.4-2.8, Fe surplus; Its wearability of piston ring of the present invention and sealing property improve greatly, and compared with existing piston ring, service life can extend more than 2 times.Piston ring hardness (HRC) reaches 65 ~ 69, and bending strength reaches 1100 ~ 1200MPa, and impact flexibility reaches 7.5-9Jcm-2.
Description
Technical field
The invention belongs to a kind of powder metallurgical technology, specifically a kind of P/M piston rings material and preparation method thereof.
Background technology
Piston ring (PistonRing) is the becket entering piston groove inside for down, and piston ring is divided into two kinds: compression ring and machine oil ring.Compression ring can be used to the burning mixture of sealing combustion indoor; Machine oil ring is then used for striking off machine oil unnecessary on cylinder.Piston ring a kind ofly has the metallic elastic ring expanding outwardly more greatly distortion, and it is mounted in its corresponding cannelure of section.Back and forth and the piston ring of rotary motion, rely on the pressure differential of gas or liquid, seal at ring periphery and cylinder and being formed between ring and a side of annular groove.Existing piston ring generally adopts Mechanical processing of casting, and then carry out the process such as chromising, nitriding, complex manufacturing, cost is high, and speed is slow, can not meet the needs of existing enterprise.
Summary of the invention
The object of this invention is to provide a kind of P/M piston rings material and preparation method thereof, it is good that the P/M piston rings of production has wearability, cost paper, fireballing feature.
Technical scheme of the present invention is as follows:
A kind of P/M piston rings material, is characterized in that being made up of the raw material of following weight percents:
Mo7-7.3, W2-2.3, Ti1.2-1.3, Ta0.2-0.3, Hf0.1-0.15, Bi2.0-2.3, carbon black 2-2.3, alundum (Al2O3) 1.0-1.2, auxiliary agent 0.9-1.2, stearic acid 2.4-2.8, Fe surplus;
Described auxiliary agent is made up of the raw material of following weight portion: iron powder 3-4, zinc oxide 2-3, titanium dioxide 1-2, kaolin powder 5-6, aluminum nitride powder 1-2, Silane coupling agent KH550 2-3, isopropyl distearyl acyloxy Aluminate 1-2, chromium boride 5-6, two ten four carbon alcohols ester 1-2, maleic anhydride 2-3, dimethicone 1-2; Iron powder, zinc oxide, titanium dioxide, kaolin powder, aluminum nitride powder are put into ball grinder to add water grinding 4-5 hour by preparation method, and after spraying dry, mix with other leftover materials, grinding 2-3 hour, is uniformly dispersed.
The preparation method of described P/M piston rings, is characterized in that comprising the following steps:
(1) each raw material after mixing and stirring 60-90 minute, is loaded mould, is pressed into base at 55-65 DEG C;
(2) pressed compact is placed in sintering furnace, to 700-750 DEG C of condition, sinters 2-3 hour with 200-220 DEG C/h of ramp; Then to 1150-1150 DEG C of condition, 2-3 hour is sintered with 120-140 DEG C/h of ramp;
(3) pressed compact is sent in steam treatment stove, steam treatment 40-50 minute at 520-550 DEG C; Take out, pressed compact is incubated 2-3 hour under 300-350 condition;
(4) pressed compact is sent in 0 DEG C of water and cool, take out;
(5) through grinding and get final product.
Auxiliary agent of the present invention can improve the dispersiveness of each material composition greatly, make each stock dispersion evenly, improve the uniformity of powder metallurgy tissue, improve the mechanical property of powder organization simultaneously, improve its intensity and anti-wear performance.
Its wearability of piston ring of the present invention and sealing property improve greatly, and compared with existing piston ring, service life can extend more than 2 times.Piston ring hardness (HRC) reaches 65 ~ 69, and bending strength reaches 1100 ~ 1200MPa, and impact flexibility reaches 7.5-9Jcm-2.
Detailed description of the invention
A kind of P/M piston rings material, be made up of the raw material of following weight percents:
Mo7, W2, Ti1.3, Ta0.3, Hf0.1, Bi2.3, carbon black 2.3, alundum (Al2O3) 1.2, auxiliary agent 1.2, stearic acid 2.4, Fe surplus;
Described auxiliary agent is made up of the raw material of following weight portion (kilogram): iron powder 4, zinc oxide 2, titanium dioxide 1, kaolin powder 6, aluminum nitride powder 2, Silane coupling agent KH550 3, isopropyl distearyl acyloxy Aluminate 2, chromium boride 6, two ten four carbon alcohols esters 1, maleic anhydride 2, dimethicone 2; Iron powder, zinc oxide, titanium dioxide, kaolin powder, aluminum nitride powder are put into ball grinder to add water grinding 4-5 hour by preparation method, and after spraying dry, mix with other leftover materials, grinding 2-3 hour, is uniformly dispersed.
The preparation method of P/M piston rings, comprises the following steps:
(1) each raw material after mixing and stirring 60-90 minute, is loaded mould, is pressed into base at 55-65 DEG C;
(2) pressed compact is placed in sintering furnace, to 700-750 DEG C of condition, sinters 2-3 hour with 200-220 DEG C/h of ramp; Then to 1150-1150 DEG C of condition, 2-3 hour is sintered with 120-140 DEG C/h of ramp;
(3) pressed compact is sent in steam treatment stove, steam treatment 40-50 minute at 520-550 DEG C; Take out, pressed compact is incubated 2-3 hour under 300-350 condition;
(4) pressed compact is sent in 0 DEG C of water and cool, take out;
(5) through grinding and get final product.
Inventive samples is through detecting, and piston ring hardness (HRC) reaches 65 ~ 69, and bending strength reaches 1100 ~ 1200MPa, and impact flexibility reaches 7.5-9Jcm-2.
Claims (2)
1. a P/M piston rings material, is characterized in that being made up of the raw material of following weight percents: Mo7-7.3, W2-2.3, Ti1.2-1.3, Ta0.2-0.3, Hf0.1-0.15, Bi2.0-2.3, carbon black 2-2.3, alundum (Al2O3) 1.0-1.2, auxiliary agent 0.9-1.2, stearic acid 2.4-2.8, Fe surplus; Described auxiliary agent is made up of the raw material of following weight portion: iron powder 3-4, zinc oxide 2-3, titanium dioxide 1-2, kaolin powder 5-6, aluminum nitride powder 1-2, Silane coupling agent KH550 2-3, isopropyl distearyl acyloxy Aluminate 1-2, chromium boride 5-6, two ten four carbon alcohols ester 1-2, maleic anhydride 2-3, dimethicone 1-2; Iron powder, zinc oxide, titanium dioxide, kaolin powder, aluminum nitride powder are put into ball grinder to add water grinding 4-5 hour by preparation method, and after spraying dry, mix with other leftover materials, grinding 2-3 hour, is uniformly dispersed.
2. the preparation method of the P/M piston rings described in 1 is required according to profit, it is characterized in that comprising the following steps: (1) by each raw material of preparation P/M piston rings according to claim 1 at 55-65 DEG C after mixing and stirring 60-90 minute, load mould, be pressed into base;
(2) pressed compact is placed in sintering furnace, to 700-750 DEG C of condition, sinters 2-3 hour with 200-220 DEG C/h of ramp; Then to sinter 2-3 hour under 120-140 DEG C/h ramp to 1150 DEG C condition; (3) pressed compact is sent in steam treatment stove, steam treatment 40-50 minute at 520-550 DEG C; Take out, pressed compact is incubated 2-3 hour under 300-350 DEG C of condition;
(4) pressed compact is sent in 0 DEG C of water and cool, take out;
(5) through grinding and get final product.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310317435.4A CN103464762B (en) | 2013-07-26 | 2013-07-26 | A kind of P/M piston rings material and preparation method thereof |
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| CN201310317435.4A CN103464762B (en) | 2013-07-26 | 2013-07-26 | A kind of P/M piston rings material and preparation method thereof |
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| CN103464762A CN103464762A (en) | 2013-12-25 |
| CN103464762B true CN103464762B (en) | 2016-04-13 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104550918A (en) * | 2014-12-25 | 2015-04-29 | 铜陵市经纬流体科技有限公司 | Acid-resistant powder metallurgy material for valve and preparation method of acid-resistant powder metallurgy material |
| CN105014080B (en) * | 2015-08-07 | 2017-08-29 | 黄若 | The design and production method of powder injection forming piston ring |
| CN107737919B (en) * | 2017-10-21 | 2019-04-09 | 山东鑫华特钢集团有限公司 | A kind of preparation method of iron-base powder metallurgy material |
| CN109108297B (en) * | 2018-09-14 | 2021-10-08 | 宁波瑞丰汽车零部件有限公司 | Piston of power cylinder for automobile steering |
| CN112536437A (en) * | 2020-11-03 | 2021-03-23 | 苏州莱特复合材料有限公司 | Powder metallurgy high-strength spring guide seat of hydraulic system and production process thereof |
Citations (4)
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| CN1332264A (en) * | 2001-07-25 | 2002-01-23 | 李喜林 | Antiwear cast alloy material with high sulfur content and several compoiste self-lubricating phases |
| CN1570427A (en) * | 2004-05-08 | 2005-01-26 | 吴立新 | Powdered metallurgical piston ring and process for production thereof |
| CN101368250A (en) * | 2008-09-08 | 2009-02-18 | 四川大学 | Rare earth additive high-carbon content cam material and powder metallurgy combined hollow camshaft |
| CN102451907A (en) * | 2010-10-28 | 2012-05-16 | 刘芳 | Preparation method for high-performance powder metallurgy material |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0525591A (en) * | 1991-07-16 | 1993-02-02 | Hitachi Metals Ltd | Wire for piston ring and its manufacture |
| JPH11343525A (en) * | 1998-05-29 | 1999-12-14 | Toyo Alum Kk | Raw material for powder metallurgy and its production |
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- 2013-07-26 CN CN201310317435.4A patent/CN103464762B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1332264A (en) * | 2001-07-25 | 2002-01-23 | 李喜林 | Antiwear cast alloy material with high sulfur content and several compoiste self-lubricating phases |
| CN1570427A (en) * | 2004-05-08 | 2005-01-26 | 吴立新 | Powdered metallurgical piston ring and process for production thereof |
| CN101368250A (en) * | 2008-09-08 | 2009-02-18 | 四川大学 | Rare earth additive high-carbon content cam material and powder metallurgy combined hollow camshaft |
| CN102451907A (en) * | 2010-10-28 | 2012-05-16 | 刘芳 | Preparation method for high-performance powder metallurgy material |
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